package com.byit.ueditor;

import com.byit.ueditor.define.ActionMap;
import com.byit.utils.PropertiesLoader;
import lombok.extern.slf4j.Slf4j;
import org.json.JSONArray;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.util.ResourceUtils;

import java.io.*;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

/**
 * 配置管理器
 *
 * @author hancong03@baidu.com
 */

@Slf4j
public final class ConfigManager {
    /**
     * 日志管理
     */
    private Logger logger = LoggerFactory.getLogger(ConfigManager.class);

    private final String rootPath;
    private final String originalPath;
    private final String contextPath;
    private static final String configFileName = "config.json";
    private String parentPath = null;
    private JSONObject jsonConfig = null;
    // 涂鸦上传filename定义
    private final static String SCRAWL_FILE_NAME = "scrawl";
    // 远程图片抓取filename定义
    private final static String REMOTE_FILE_NAME = "remote";

    /**
     * nginx代理url
     */
    @Value("${minio.searchMinio}")
    private String searchMinio;

    public String getSearchMinio() {
        return searchMinio;
    }

    /*
     * 通过一个给定的路径构建一个配置管理器， 该管理器要求地址路径所在目录下必须存在config.properties文件
     */
    private ConfigManager(String rootPath, String contextPath, String uri) throws FileNotFoundException, IOException {

        rootPath = rootPath.replace("\\", "/");

        this.rootPath = rootPath;
        this.contextPath = contextPath;

//		if ( contextPath.length() > 0 ) {
//			this.originalPath = this.rootPath + uri.substring( contextPath.length() );
//		} else {
//			this.originalPath = this.rootPath + uri;
//		}

        this.originalPath = this.rootPath;

        this.initEnv();

    }

    /**
     * 配置管理器构造工厂
     *
     * @param rootPath    服务器根路径
     * @param contextPath 服务器所在项目路径
     * @param uri         当前访问的uri
     * @return 配置管理器实例或者null
     */
    public static ConfigManager getInstance(String rootPath, String contextPath, String uri) {

        try {
            return new ConfigManager(rootPath, contextPath, uri);
        } catch (Exception e) {
            return null;
        }

    }

    // 验证配置文件加载是否正确
    public boolean valid() {
        return this.jsonConfig != null;
    }

    public JSONObject getAllConfig() {

        return this.jsonConfig;

    }

    public Map<String, Object> getConfig(int type) {

        Map<String, Object> conf = new HashMap<String, Object>();
        String savePath = null;

        switch (type) {

            case ActionMap.UPLOAD_FILE:
                conf.put("isBase64", "false");
                conf.put("maxSize", this.jsonConfig.getLong("fileMaxSize"));
                conf.put("allowFiles", this.getArray("fileAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("fileFieldName"));
                conf.put("minioNginxServer", this.jsonConfig.getString("minioNginxServer"));
                conf.put("minioEnable", this.jsonConfig.getBoolean("minioEnable"));
                savePath = this.jsonConfig.getString("filePathFormat");
                break;

            case ActionMap.UPLOAD_IMAGE:
                conf.put("isBase64", "false");
                conf.put("maxSize", this.jsonConfig.getLong("imageMaxSize"));
                conf.put("allowFiles", this.getArray("imageAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("imageFieldName"));
                conf.put("minioNginxServer", this.jsonConfig.getString("minioNginxServer"));
                conf.put("minioEnable", this.jsonConfig.getBoolean("minioEnable"));
                savePath = this.jsonConfig.getString("imagePathFormat");
                break;

            case ActionMap.UPLOAD_VIDEO:
                conf.put("maxSize", this.jsonConfig.getLong("videoMaxSize"));
                conf.put("allowFiles", this.getArray("videoAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("videoFieldName"));
                conf.put("minioEnable", this.jsonConfig.getString("minioEnable"));
                conf.put("minioNginxServer", this.jsonConfig.getString("minioNginxServer"));
                conf.put("minioEnable", this.jsonConfig.getBoolean("minioEnable"));
                savePath = this.jsonConfig.getString("videoPathFormat");
                break;

            case ActionMap.UPLOAD_SCRAWL:
                conf.put("filename", ConfigManager.SCRAWL_FILE_NAME);
                conf.put("maxSize", this.jsonConfig.getLong("scrawlMaxSize"));
                conf.put("fieldName", this.jsonConfig.getString("scrawlFieldName"));
                conf.put("isBase64", "true");
                conf.put("minioNginxServer", this.jsonConfig.getString("minioNginxServer"));
                conf.put("minioEnable", this.jsonConfig.getBoolean("minioEnable"));
                savePath = this.jsonConfig.getString("scrawlPathFormat");
                break;

            case ActionMap.CATCH_IMAGE:
                conf.put("filename", ConfigManager.REMOTE_FILE_NAME);
                conf.put("filter", this.getArray("catcherLocalDomain"));
                conf.put("maxSize", this.jsonConfig.getLong("catcherMaxSize"));
                conf.put("allowFiles", this.getArray("catcherAllowFiles"));
                conf.put("fieldName", this.jsonConfig.getString("catcherFieldName") + "[]");
                savePath = this.jsonConfig.getString("catcherPathFormat");
                break;

            case ActionMap.LIST_IMAGE:
                conf.put("allowFiles", this.getArray("imageManagerAllowFiles"));
                conf.put("dir", this.jsonConfig.getString("imageManagerListPath"));
                conf.put("count", this.jsonConfig.getInt("imageManagerListSize"));
                break;

            case ActionMap.LIST_FILE:
                conf.put("allowFiles", this.getArray("fileManagerAllowFiles"));
                conf.put("dir", this.jsonConfig.getString("fileManagerListPath"));
                conf.put("count", this.jsonConfig.getInt("fileManagerListSize"));
                break;

        }

        conf.put("savePath", savePath);
        conf.put("rootPath", this.rootPath);

        return conf;

    }

    private void initEnv() throws FileNotFoundException, IOException {

        File file = new File(this.originalPath);

        if (!file.isAbsolute()) {
            file = new File(file.getAbsolutePath());
        }

        this.parentPath = this.originalPath;

        String configContent = this.readFile(this.getConfigPath());

        try {
            JSONObject jsonConfig = new JSONObject(configContent);
            this.jsonConfig = jsonConfig;

            // 查询图片服务器地址（该操作为动态获取地址，当后台配置地址更变时，使用最新配置）
            String url = searchMinio+"/";
            this.jsonConfig.put("minioNginxServer", url);
            this.jsonConfig.put("imageUrlPrefix", url);
            this.jsonConfig.put("imageManagerUrlPrefix", url);
            this.jsonConfig.put("fileManagerUrlPrefix", url);
            this.jsonConfig.put("scrawlUrlPrefix", url);
            this.jsonConfig.put("snapscreenUrlPrefix", url);
            this.jsonConfig.put("catcherUrlPrefix", url);
            this.jsonConfig.put("videoUrlPrefix", url);
            this.jsonConfig.put("fileUrlPrefix", url);

        } catch (Exception e) {
            logger.error("", e);
            this.jsonConfig = null;
        }

    }

    private String getConfigPath() {
        String path = this.parentPath + ConfigManager.configFileName;
        logger.debug("config Path = {}", path);

        return path;
    }

    private String[] getArray(String key) {

        JSONArray jsonArray = this.jsonConfig.getJSONArray(key);
        String[] result = new String[jsonArray.length()];

        for (int i = 0, len = jsonArray.length(); i < len; i++) {
            result[i] = jsonArray.getString(i);
        }

        return result;

    }

    private String readFile(String path) {

        StringBuilder builder = new StringBuilder();

        ResourceLoader resourceLoader = new DefaultResourceLoader();
        logger.debug(" resourceLoader ：{}", resourceLoader);
        Resource resource = resourceLoader.getResource("classpath:config.json");


        logger.debug("resource：{}", resource);

        try {

            URL url = ResourceUtils.getURL("classpath:config.json");


            InputStream inputStream = url.openStream();

//		    if (path.indexOf("jar!") != -1){
//		        logger.debug("is jar file load ueditor config!");
//                in = File.class.getResourceAsStream("/BOOT-INF/classes/config.json");
//            } else {
//                logger.debug("is normal file load ueditor config!");
//
//            }

            InputStreamReader reader = new InputStreamReader(inputStream, "UTF-8");
            BufferedReader bfReader = new BufferedReader(reader);

            String tmpContent = null;

            while ((tmpContent = bfReader.readLine()) != null) {
                builder.append(tmpContent);
            }

            bfReader.close();

        } catch (UnsupportedEncodingException e) {
            // 忽略
            log.error("", e);
        } catch (IOException e) {
            log.error("", e);
        }

        return this.filter(builder.toString());

    }

    // 过滤输入字符串, 剔除多行注释以及替换掉反斜杠
    private String filter(String input) {

        return input.replaceAll("/\\*[\\s\\S]*?\\*/", "");

    }

}
